What do you mean by glitching? Do you mean as long as the 828 is working correctly? Or something to do with jitter?
Also, I just want to use the 828 to get stereo material out of the computer via firewire and into a Cranesong Hedd. But I read that firewire may be inferior to a pci interface. Is this true? And/or may it be inferior only if trying to move many channels of audio through it at once?
I had a defective 828. It would click on occasion. Got it replaced, and it was fine after that. Click = digital glitch. They show up as tall full sample lines on a waveform. Can't miss them with your eyes OR your ears. So, give it a listen. If it sounds fine, it is as fine as it ever will be.
I'd used the spdif ins and outs for years back in the system 9 (mac) days, mostly going in and out of a dat player digitally. This was the orginal 828, btw. Once i got the initial problem worked out, I never had any problems related to the 828's digital i/o.
I've heard the firewire to pci argument before too. If it works, it works. You won't get 48 tracks out of a single firewire400 interface though.
It's my understanding that the new HDSP cards have the mixer engine embedded in the hardware so they're supposed to boast extremely low latency times.
I was shopping for an ADAT interface a few weeks back and was considering either a MOTU 2408 or the RME HDSP-9652.
The Multiface has the same implementation as the other RME PCI card, so technically it should be a hair faster than the MOTU and possibly a little more stable on the PC.
Unfortunately, I can't speak of real-world performance. Things here have changed so I'm not in the market for one of these at the moment. I wouldn't even bother chiming in except I've seen this come up a few times this week and no one has mentioned the hardware mix engine thing...